package io;

import java.io.*;

public class Test {
    public static void main(String[] args) throws IOException {
        FileOutputStream fos=new FileOutputStream("fos.txt");
        for (int i=0;i<=25;i++){
            fos.write(97+i);
        }
        System.out.println("写出完毕");
        fos.close();
    }
}
